How to fix a GMC Envoy stall idle problem?

Hope this helps. Also you will need to reset the computer and check engine light, just disconnect the pos post to the battery for ten minutes the reconnect post and turn your ignition key on and off three times to reset the computer and clear codes.

Why does my Chevy Malibu start then stall?

This may be a sign of a failing idle air control valve. The idle air control valve is located on or near your intake manifold that monitors the air intake as it is mixed with fuel prior to being injected into the engine.

Why does my car stall when I release the throttle?

In cases where this valve is clogged or is failing, your vehicle will stall instead of slowing to an idle after the release of the throttle. I would recommend having an expert, such as one from YourMechanic, come to your home to replace your idle air control valve.

Why does my GMC Envoy have a rough idle?

While there are a variety of reasons your GMC Envoy has a rough idle, the most common 3 are a vacuum leak, an issue with the spark plugs, or a problem with the ignition coil. See what others are asking about their GMC Envoy. Get answers from RepairPal’s community of auto experts and enthusiasts.

Why does my envoy have a gasoline smell?

Traced the gasoline smell to a leaking FPR, gasoline smell fixed but rough idle continues. I admit I didn’t check the intake bolts behind the little hose, but none of the other bolts were loose and I sprayed some starter fluid around that area with no change in rpm.

Is the top end of the envoy OK?

Accelerates fine and top end is fine. Just a pronounced misfire at about 500 rpm. Cleaned TB, run BG44k through tank. Cleaned Camshaft actuator solenoid. Was clean even after 200k, first time I’ve pulled it. Pulled plugs, look fine. Have about 50 k on denso plugs. Changed motor mounts with oem.

What’s the fuel filter on a Toyota envoy?

Just a pronounced misfire at about 500 rpm. Cleaned TB, run BG44k through tank. Cleaned Camshaft actuator solenoid. Was clean even after 200k, first time I’ve pulled it. Pulled plugs, look fine. Have about 50 k on denso plugs. Changed motor mounts with oem. Air Filter has about 10k on it, fuel filter at about 25k.

Why does my GMC Envoy XL not start?

I have a 2005 gmc envoy xl 4.2l and im having problems with the truck not wanting to start. I let it sit for 2 hours and then it will start ive got a new ignition switch new starter new alternater new batter new pcm/ecm new bcm and im still having problems. Idk what else it can be 12 people found this helpful.

What was the problem with my 2004 envoy?

2004 Envoy.. When turned on A/C or defrost engine would stall & cut off. I turned off A/C or defrost, cranked & ran fine as long as both were off. Took to shop; had throttle cleaned.

Why does my GMC Envoy die when I Turn Off the a / C?

engine will begin to die when A/C is on and car in or out of gear. I turn off the A/C and it runs fine and if it goes dead it will crank back up with no problem. My 2004 GMC Envoy vibrates when I turn the air conditioner or heater on . It stalls while I’m driving it and it scares me and makes me think that I’m going to break down .

Why does my GMC Envoy stall in traffic?

I have a 2004 GMC Envoy and came onto the problem of the car stalling when stopped in traffic while in gear. This suddenly happen to my vehicle after I had to changed the battery, although this didnt occur to me until after I solved my problems.

2004 Envoy.. When turned on A/C or defrost engine would stall & cut off. I turned off A/C or defrost, cranked & ran fine as long as both were off. Took to shop; had throttle cleaned.

Who is the owner of the 2005 GMC Envoy?

2005 GMC Envoy/Envoy XL/Envoy Denali Owner ManualM GENERAL MOTORS, GM, the GM Emblem, GMC, the GMC Truck Emblem and the names ENVOY, and DENALI are registered trademarks of General Motors Corporation. This manual includes the latest information at the time it was printed. We reserve the right to make changes after that time without further notice.

Are there any problems with my GMC Envoy?

I have a 2005 GMC Envoy and my headlights have quit working, well at least the low beams (both sides at the same time). I have checked the fuses and the bulbs and both are fine. What else can I check before giving up and landing at the mercy of a local auto shop?

What should I do if I Lost my GM key?

If you have lost your keys, or have just bought a new car, you will need to program a new keyless remote. There are three broad categories when it comes to GM keyless remotes: pre-2007, 2007–10 with VIC, and 2007 – 10 without VIC. If your car is a GM post-2010 model, you should contact your nearest car care professional.

How do I relearn my GM keyless remote?

Put your key in the ignition and turn it all the way clockwise until you hear the engine come on. Make sure that the gear shift is set to park. Press and hold the Vehicle Information button until the display reads “Press V to Relearn Remote Key. ” If for some reason the display does not appear, restart your car, and repeat the previous steps.

What to do if your GMC Envoy wont start?

You’ll be leaving the ignition on so as an option hook up a battery charger . 1.Turn the key to on and attempt to start engine ( it won’t start I know) leave the ignition in the on position do not turn it off ,you see the security light flashing or just staying on ?your gonna wait about 10 minutes for that sucker to turn off.

Can a 1999 GMC Envoy have standard headlights?

As of Yet, after extensive searching, can not find a thing regarding converting HID headlights on a 1999 Envoy to Standard Headlights. If you run across something, it would should be appreciated if you would pass it along to me. Thanks I am in the same boat with a 2000 Jimmy Diamond edition and yes you can.

Why are the fog lights not working on my GMC Envoy?

The Fog lights work, and the high beams work when the knob is turned to “on”, but not on automatic. It’s almost like the sensor is not sensing that it is dark outside. Can anyone help?

How many people have commented on the GMC Envoy?

Go to the next comment I’ll post it on there don’t worry it’s easy as heck . 35 people found this helpful.

Is there an issue with the envoy’s rough idle?

No Codes Having an issue with a rough idle condition, goes away at about 700 rpm. Accelerates fine and top end is fine. Just a pronounced misfire at about 500 rpm. Cleaned TB, run BG44k through tank. Cleaned Camshaft actuator solenoid. Was clean even after 200k, first time I’ve pulled it. Pulled plugs, look fine.

Why does my car idle when the AC is on?

It also helps increase engine speed when an extra load is placed on the engine, for example, when you turn on the AC or defrost system. However, a faulty or restricted IAC valve may keep the engine idle speed from increasing when it needs to.

What causes the idle speed to go up or down?

The idle air control valve is programmed to regulate and maintain the engine idle speed at a constant rate. If the valve fails or has any issues it can cause the idle speed to be thrown off. This may result in an unusually high or low idle speed, or in some cases a surging idle speed that repeatedly climbs and falls. 2. Check Engine Light comes on

Why does my envoy idle at 600 rpm?

These motors idle at 600 RPM give or take and a worn motor mount will produce a felt vibration at idle that goes away just above idle. If you have never changed the mounts, I would consider that a possibility. Only use AC mounts, the aftermarket is very hit or miss, biased to miss, on damping the 10 Hz frequency at idle.

What causes idle surges on a car ECM?

Idle surging can be caused due to other issues in the car, but if it happens in conjunction with other throttle position sensor symptoms, the culprit is often the TPS. At idle, the ECM will not get the correct information and the throttle will variate randomly causing idle surges.

Can a bad throttle position sensor cause idle surging?

What kind of MAF sensor does GM use?

This type of GM mass air flow (MAF) sensor is used in a lot of GM makes and models, to find out if this article applies to your specific GM (Cadillac, Chevy, Buick, GMC) vehicle, take a look at the list at the bottom of this page. Now, in case this is not the article you’re looking for, there are also 3 other GM MAF sensor test articles:

What are the symptoms of a bad MAF sensor?

$0.00 1 Runs rich at idle or lean under load These symptoms indicate a MAF that has a contaminated hot wire. 2 Constantly runs rich or lean A MAF sensor that continuously over-reports or under-reports airflow into the engine will cause an engine to run rich or lean. 3 Rough idle or stalls

What happens when the MAP sensor goes bad?

When the driver uses the engine to brake, pressure can go as low as 10 in. Hg. Upon accelerating, however, the open throttle body allows air to rush in faster, increasing pressure in the intake. At wide-open throttle, intake and atmospheric pressure are nearly equal. MAP sensor problems could trigger a DTC and check engine light.

The symptoms of a bad mass air flow sensor include a car that is difficult to start, bad fuel economy, a rough idle, lack of power especially when accelerating and sometimes a fuel smell from the exhaust fumes. A properly functioning MAF sensor is vital for an engine to run efficiently.

What are the symptoms of a bad air flow sensor?

The symptoms of a bad mass air flow sensor include low engine power, poor fuel economy, an engine that won’t start, a check engine light on the dash and a gas smell from the exhaust fumes. A bad mass air flow sensor is often the likely culprit if your car isn’t running as it should.

What happens if the mass air flow sensor is not working?

The job of the mass air flow sensor is to keep track of the amount of air coming in through the air filter, so that the ECU can adjust the amount of fuel getting into the engine. If the mass air flow sensor isn’t working properly then you will be faced with one or more symptoms such as lack of power and bad fuel economy.

When is the p0507 GMC diagnostic trouble code set?

The P0507 Diagnostic Trouble Code (DTC) is set when the Powertrain Control Module detects an engine speed outside of the Idle Air Control range of control. Need more information on how to fix the P0507 GMC code?

Where is the trouble code on a GMC?

When retrieving GMC trouble codes with an OBD II scan tool, proceed as follows: 1. Connect scan tool to the 16-pin data link connector (DLC) located underneath the steering column. The connector may have a removable cover. 2. Turn the ignition on.

How does the idle speed work on a GMC?

The PCM retracts the IAC valve pintle away from its seat to increase the idle speed. The retracting of the IAC valve pintle allows more air to bypass the throttle plates. One of the PCM s uses for the IAC system is to maintain a desired idle speed. This DTC sets when the PCM detects an engine speed outside of the IAC’s range of control.

What is the trouble code on my GMC Envoy?

One of the most common trouble codes with the GMC Envoy is the P0171 code. This code number references a number that is given to you when you plug your car into a OBDII scanner. Envoy P0171 Code Defined. P0171 is an OBDII trouble code.

What does the p0171 code on a GMC Envoy mean?

One of the most common trouble codes with the GMC Envoy is the P0171 code. This code number references a number that is given to you when you plug your car into a OBDII scanner. P0171 is an OBDII trouble code. The code technically stands for: The code is thrown when the oxygen sensors detect that there’s not enough oxygen in the exhaust system.

What’s the mileage on a 2006 GMC Envoy?

The failure mileage was 98,000 and the current mileage was 138,000. The contact owns a 2006 GMC Envoy. The contact stated that while driving at approximately 30 mph, the vehicle stalled. The vehicle was not taken to the dealer for diagnosis.

How long does it take to reset Transmission Control Module Chevy?

When it is done with the TCU as well as the programming of the ECU, you should take your car for a ride. The trip may take 15 to 20 minutes. You must keep in mind that you are educating your engine exactly how you drive.

What should I do if my ECU has been reset?

Turn the ignition to the “On” position but don’t crank the engine (it won’t start anyway). Wait five minutes and reinsert the fuse. The “Check Engine” light will blink, then shut off. This will indicate that your ECU has been reset. “Auto Repair For Dummies”; Deanna Sclar; IDG Books Worldwide; 1999

What happens when air conditioner is turned on at idle?

Might want to try this.found bulletin #1878920. Engine stalls when air conditioning is turned on at idle – keywords HVAC rough condition CJ2 CJ3 surge. Engine may stall with the air-conditioner on and or while adding additional loads to the engine at idle.

When does an engine stall with air conditioner on?

Engine may stall with the air-conditioner on and or while adding additional loads to the engine at idle. An example of an addition load would be turning the steering wheel left or right with the air-conditioning on. This type of stall usually occurs during idle or slow parking lot maneuvers.

What happens when GMC Acadia engine shut off without warning?

It results in an immediate loss off all power. See all problems of the 2014 GMC Acadia .

Why does my GMC Sierra suddenly stop running?

Truck suddenly stops running, acting like it’s out of fuel. There is fuel in the gas tank and, I can hear the fuel pump when I turn the ignition on. Is there a fuse, or relay that is maybe causing this to happen?

Is there a way to turn off auto stop start?

Opinions on engine auto-stop-start technology are scattershot: some enjoy the technology and its attempt to increase fuel efficiency, some are indifferent, and the rest downright hate the feature and will go to great lengths to turn the system off at every opportunity, especially in vehicles that don’t offer a way to disable the feature.

Do you need an OEM Service Manual for envoy?

Only use AC mounts, the aftermarket is very hit or miss, biased to miss, on damping the 10 Hz frequency at idle. He did say he replaced the mounts with OEM. Need GMT360/370 Service Manuals?

How big is the fuel filter on an envoy?

Pulled plugs, look fine. Have about 50 k on denso plugs. Changed motor mounts with oem. Air Filter has about 10k on it, fuel filter at about 25k. Not sure where to go from here, I don’t want to just throw parts at it.

Why does my GMC air conditioner stop working?

For about 5 miles the A/C worked normally till we hit a R/R and the bump made it stop blowing cold air and he was finally convinced. Back to the shop and 30 min later they found the problem. Turned out to be the low pressure switch, (under hood on bottom of small tank) it was corroded and causing a loss of electrical contact.

What to do when your GMC Truck won’t start?

Try turning your key to the run position a few times (with out starting). Then try to start it. If it starts, sounds like what mine did. I replaced the fuel pump assembly and that fixed the problems. Very common problem.

When did my GMC Sierra air conditioner stop working?

I had a 2001 GMC Sierra that did this when truck was less the one year old (summer of 2001 is when it was). The dealer had the truck in the shop idling for a long time and the A/C worked perfectly. I told them to take it for a ride and see. So the service manager in an effort to convince me nothing was wrong went for a ride with me driving.

Can a faulty manifold sensor cause engine stall?

A faulty manifold pressure sensor has symptoms that closely resemble; a vehicle with injector problems or low compression problems. If the (MAP) sensor is not reading accurately; the (PCM) may add too much fuel or not enough. This again will cause engine stalling.

Can a car stall with a bad throttle position sensor?

The engine can stall for no reason and without any warning. This happens when the TPS gives incorrect information to the ECM. The engine can stall at high speed, at low speed, or even at idle. A faulty throttle position sensor will not let your car accelerate normally. Though this doesn’t happen all the time.

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